I've had 2 people call and say things printed out (one was out of the
office at the time) that were unfortunately extremely confidential. One
of these things was well over a year old. The only trigger I can
potentially look at was I pushed out patches from KB 884897 and 893225
that relate to iprint company wide because not everybody had them.

I'm wondering if somehow these were stuck somewhere in their machine and
released after the patches were applied and they rebooted? (I didn't
have force reboot set, so it would have been the next time they logged in).